• Silver-colored arista H-D400-4Q100-1M sfp+ transceiver modules with blue handles and metallic connectors for 400g active DAC
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Arista

Arista QDD-400G-SR8-Arista | 400GBASE-SR8 QSFP-DD Transceiver, 850nm, 100m MMF

QDD-400G-SR8-Arista

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Description

The Arista QDD-400G-SR8 is a 400GBASE-SR8 QSFP-DD optical transceiver designed for high-speed data centre interconnects over multi-mode fibre. It uses eight parallel 850nm VCSEL channels operating at 53.125 Gbps each to deliver 400 Gbps aggregate throughput up to 100m over OM4 fibre via an MPO-16 connector. Fully compliant with IEEE 802.3bs and QSFP-DD MSA standards, this module supports digital diagnostics monitoring (DDM/DOM) and operates in commercial temperature ranges from 0 to 70°C.

Features

IEEE 802.3bs 400GBASE-SR8 compliant for standards-based interoperability
- 8-channel parallel optics architecture with 850nm VCSEL transmitters
- Hot-pluggable QSFP-DD form factor for easy deployment and maintenance
- PAM4 (Pulse Amplitude Modulation 4-level) encoding at 53.125 Gbps per lane
- Digital Diagnostics Monitoring (DDM/DOM) for real-time performance visibility
- MPO-16 APC optical connector for low-loss multi-mode fibre connectivity
- Supports breakout to 2x 200G or 8x 50G for flexible network architectures
- Commercial temperature range operation (0°C to 70°C)
- Low power consumption (<12W) for efficient high-density deployments
- QSFP-DD MSA compliant for broad platform compatibility
- RoHS compliant for environmental responsibility

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Form Factor: QSFP-DD (Quad Small Form Factor Pluggable - Double Density)
- Data Rate: 400 Gbps aggregate (8 x 50 Gbps per lane)
- Wavelength: 850nm (VCSEL technology)
- Reach: Up to 70m on OM3 / 100m on OM4 multi-mode fibre
- Connector: MPO-16 APC
- Channels: 8 independent transmit and receive channels
- Compliance: IEEE 802.3bs 400GBASE-SR8, QSFP-DD MSA
- Digital Diagnostics: DDM/DOM support (temperature, voltage, TX/RX power monitoring)
- Operating Temperature: 0°C to 70°C (commercial grade)
- Electrical Interface: 60-pin QSFP-DD MSA-compliant edge connector
- Power Consumption: <12W typical
- Breakout Support: 2x 200G-SR4 or 8x 50G-SR
- Optical Budget: Minimum 1.9 dB

FAQs

Q: What fibre types are compatible with the QDD-400G-SR8?
A: This transceiver is designed for multi-mode fibre (MMF) deployments. It supports 70m transmission over OM3 fibre and 100m over OM4 fibre using an MPO-16 APC connector. It is not compatible with single-mode fibre.

Q: Can this module be used in breakout configurations?
A: Yes, the QDD-400G-SR8 supports breakout to 2x 200GBASE-SR4 or 8x 50GBASE-SR connections, providing flexible deployment options for data centre architectures requiring higher port density at lower speeds.

Q: Is the QDD-400G-SR8 compatible with other vendor equipment?
A: The module is fully compliant with IEEE 802.3bs 400GBASE-SR8 and QSFP-DD MSA standards, ensuring interoperability with other standards-compliant 400G switches and networking equipment from various vendors.

Q: What diagnostic features does this transceiver support?
A: The QDD-400G-SR8 includes Digital Diagnostics Monitoring (DDM/DOM) capabilities, allowing real-time monitoring of optical output power, receive optical power, internal module temperature, transmit bias current, and supply voltage for proactive network management.

Q: What is the typical power consumption of this module?
A: The QDD-400G-SR8 typically consumes less than 12W of power, making it suitable for high-density 400G deployments where power and cooling efficiency are important considerations.

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